How To Straighten Pex Pipe

How to Straighten PEX Pipe


PEX (cross-linked polyethylene) pipe is a popular choice for plumbing systems and radiant heating applications due to its flexibility, durability, and resistance to corrosion. While PEX pipe is highly flexible and easy to work with, it can sometimes develop bends or kinks during storage or installation. In this article, we will guide you on how to straighten PEX pipe effectively.

1. Softening the Pipe

Before attempting to straighten a bent or kinked PEX pipe, it is essential to soften the pipe to make it more pliable. First, fill a large pot or bucket with hot water (not boiling) and submerge the bent section of the PEX pipe into the water. Allow the pipe to soak for a few minutes until it becomes more flexible.

Once softened, carefully remove the pipe from the hot water and immediately straighten it by hand. Be cautious not to burn yourself during this process, as the water and pipe may still be hot. If the pipe does not straighten easily, repeat the softening process until it becomes more pliable.

2. Utilizing a Heat Gun

If soaking the PEX pipe in hot water does not yield the desired results, you can also utilize a heat gun to soften the pipe and straighten it effectively. Start by setting the heat gun to a low or medium temperature and keeping it a few inches away from the bent section of the pipe.

Moving the heat gun in a back-and-forth motion, heat the bent area of the PEX pipe gradually. Be cautious not to stay in one spot for too long, as this could potentially damage the pipe or create weak spots. As the pipe becomes more pliable, straighten it carefully by hand, using light pressure, until the desired shape is achieved.

3. Using a Combination of Hot Water and a Bending Spring

In some instances, using a bending spring can be helpful in straightening more stubborn bends in PEX pipe. After softening the pipe with hot water, insert a bending spring into the bent section. The bending spring helps to maintain the shape of the pipe during the straightening process.

Ensure that the bending spring is long enough to cover the entire bent section. Gently heat the pipe using a heat gun as mentioned in the previous step, while also applying slight pressure to the pipe’s outer side. The combination of the hot water softening the pipe and the bending spring supporting its shape will help in achieving a straightened PEX pipe.

4. Precautions and Safety Measures

When working with hot water or a heat gun, it’s essential to follow appropriate safety measures to avoid any accidents or injuries:

  • Wear appropriate protective gloves and eyewear to prevent burns and other injuries.
  • Keep a fire extinguisher nearby, especially when working with a heat gun.
  • Avoid overheating the pipe to prevent damage or deterioration in its structural integrity.
  • If you are unsure about the straightening process or dealing with complex bends, consult a professional plumber for assistance.


Straightening PEX pipe is an important step for ensuring optimal performance and efficiency in your plumbing or radiant heating system. By utilizing methods such as softening with hot water, using a heat gun, or combining hot water and a bending spring, you can effectively straighten PEX pipe and eliminate bends or kinks. However, it is crucial to exercise caution and prioritize safety during the straightening process to avoid any mishaps. If needed, always seek professional assistance to achieve the best results.

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